Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
A317234
Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 4, 6, 7 or 8 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =24a(2) =60a(3) =168a(4) =674a(5) =2432a(6) =8255a(7) =29245a(8) =105103a(9) =371011a(10) =1309368a(11) =4655316a(12) =16519210a(13) =58492609a(14) =207432479a(15) =735833616a(16) =2608622433a(17) =9248841123a(18) =32798084620a(19) =116297139395a(20) =412355808249
External references
- oeis: A317234